Relay.



L. H. THULLBN.

RELAY.

APPLICATION FILED MAR. 18, 1905.

Patented Mar. 30, 1909;

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m ill L. H. THULLEN.

RELAY.

APPLICATION FILED MAR, 18, 1905;

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Patented Mar. 30, 1909.

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L H. THU LLEN.

RELAY.

APPLICATION FILED MAB.18, 1905. 91 6,505. Patented Mar. 30, 1909.

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' State of Pennsylvanim'h ave invented certain This is due almost entirely to the residual iron cores in the relay magnets, and conse- PATENT OFFICE.

LOIns H-lTiiU-IQLiiN,; or nhenwoon, PENNSYLVANIA, assicnoa T0 THE-e-NIo'Nswiro -i SIGNAL QOMPANY,:OF sWIssvALE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA. 1

xtELAY.

To all whom it may concern:

Be it known that L'Lonis H. THULLEN, a citizen of the United States, residing at Edgewood, in the county of Allegheny and new and useful Improvements in Relays, of which the following is a specification.

My invention relates to relays, either of the alternating or of the direct current type.

An object of my invention is to have the relcasii'ig point of the relay substantially the same as its picking up point. I

In relays of the ordinary type as heretofore used, the point at which they release their armatures is about of their picking up point; that is to say, if it takes, for example, a current of milliamperes for these relays to attract their armatures, they will not release their armatures until the current is reduced to nearly 30 mill-iamperes.

magnetism in the iron parts of the relay. The present invention does away wlth the quently with this, residual magnetism, and operates upon the principle of having the armature movably mounted within the corespace of the relay magnet. This armature is so mounted that when there is no current on the magnet, it normally assumes a position that is outside the position which it will assume when the magnet is energized. By providing suitable connecting means between the armature and the moving contact parts of the relay, I transmit the motion of the armature of said parts of the relay and suitably operate them.

I will describe a relay embodying my invention and then point out the novel features thereof in a claim.

In the accompanying drawings Figure 1 is a mid-sectional view of a relay embodying my invention. Fig. 2 is a mid-sectional view at right angles to Fig. 1. Fig. 3 is a detailed view of the contact bearing parts of the relay shown in Figs. 1 and 2. Fig. 4 is a plan view, and Fig. 5 is a detailed View of the contact bearing parts of another type of relay.

In the drawings similar reference characters denote corresponding parts.

A designates a winding which is arranged on a suitable spool having a centrally arranged opening, which I have termed a core space. The core space in this in- Specification of Letters Patent. Patented Mar'ch so; 1909.-

Application filed March 18,1905. Serial No. 250,757.

crosssection.

stance is oval-like in shape in horizontal B designates an armature, which is made '7 of magnetic material, and will be laminated in case alternating currents are to be used in the winding. 'The' armature is secured to a shaft pivotally mounted, as shown in the supports S, S. These supports are preferably made of brass.

C is a weight fastened to the armature shaft, and cooperating with the stop D causes the armature to normally have a position at an angle to the walls of the core space. The stops 1) and D are adjustable and serve to limit the oscillation of the armature both to the right and to the left.

Z is a crank arm secured to the shaft, and arranged intermediate the'armature B and weight C.

Y is a connecting rod joining the end of the crank arm Z with a hooded arm E, which is mounted on suitable pivots c, 0 which extend through the end portions f, f of a crank lever F. The crank lever F forms part of a frame F which carries contacts f f adapted to engage fixed contacts f, f. Y

K designates a spring constituting a connection between the lever E and the crank lever F. \Vhen the end of the spring K connected with the lever E is to one side of the vertical plane of the pivots e, 0 the crank lever F is operated to move the contacts f f into or out of engagement with the fixed contacts f f. This is a well known movement and need not be described further. I

In Fig. 5 the hooded lever and spring are dispensed with and the rod Y connected directly with th frame F I I Describing now the operation of my invention, when the windmg is energized by an electric current, the armature will move on its pivots, and will tend to parallel itself with the magnetic lines of force generated by the electric current in the winding. The crank arm'Z, due to the motion of the'a-rrna ture, will elevate the connecting rod Y and operate the contact bearing parts of the relay. As soon as the winding is de'nergized the armature will return to its inclined position by gravity, due to the counterweight C, until it strikes the stop D. Similarly the stop D prevents the armature from swinging beyond the vertical when it 1s drawn toward a central position by the lines of force. v

hat I desire to claim and secure by Letters Patent is: e r

In a relay, the combination of fixed contacts, a rocking frame carrying contacts to engage said fixed contacts a Winding provided with a vertically extending central space, an armature pivotally mounted within said space and normally tending to parallel itself with the walls of the space when the winding is energized, a weight con nected to the armature to cause it to assume a position inclined to the walls of the space when the Winding is denergized, and a posi- 15 tive connection between the armature and the rocking frame for transmitting movement from the former to the latter.

In testimony whereof I have signed my name to this specification in the presence of 20 two subscribed witnesses.

LOUIS H. THULLEN. A

'Witnesses W. L. MCDANIEL, JAMES CHALMERs, Jr. 

